hard wick



K G I W D R A H M W u (No Model.)

PNEUMATIC TIRE I No. 501,716. Patented July 18, 1893.

' UNITED STATES PATE T IOFFICE.

FREDERICK W. THARDWICK, or PAs sAI f-NEW JERSEY, ASSIGNOR 'ro THE NEW YORK BELTING AND PACKING COMPANY, LIMITED, OF ENGLAND.

PNEUMATIC TIRE; v

smcIFIcATIoN forming pm of Letters mm m, 501,716, dated- July 1e, 189a. ApplioatlonflledApril19,1893- fierial macaw. (Nonrolleh) t To all whom it my concern.- 2

Be it known that I, FREDERICK w. HA D. WIOK,of the city and county of Passaic and State .of New Jersey, have invented a new,

and useful Improvementin Pneumatic Tires,

which is. fully set'forth in the following specification.

My invention'relates to pneumatic tires, such as are adapted for useon bicycles, sulkies, buggies, &c.

As new frequentlycons-truoted, pneumatic tirescontain an outer tube, i'ncasing an inner vtube, which is separable therefrom. The tire 'is slipped over the rimof the wheel, in the ordinary-well known 'mannen-and' the rim, ,and that portiontof the tire, which fits upon That part The outer tube of the tire has a-slit, running along the center of the rim part of. the tire for any convenient distance, whereby access can readily be obtained to the interior tube of the tire. This slit in the-rim-part of the has been laced up, the tire is adjusted inpo;

outer tireis unit'edby lacings, passed through holes near the edges of the slit. After the slit sition upon the rim, and cemented as aforesaid. In case of puncture to the tire, theti're A is removed through the slit, or so much of the is slipped oi the rim, the lacing is taken out and the slit is opened, and the interior tube same is removed as may be necessary. The interior tube is patched, or mended, by methods well known in the art, andis then re- *turned toits proper position.

The interior tube in such a tireas this, may eitherbe continous, or it may have butted, or closed ends.

. While the form of tire before describedhas advantages, which have :given it popularity, there are certain objections thereto, which my invention is designed to obviate; .The cemcut is apt to fill up, or obstruct the holes, or apertures for the lacings. Great force is then required to'remove the lacings, and the lacings are apt to be'broken. The lacings are liable to becomerottedv By reason-of. the

cement on the lacings and'in'j-the lacing holes,

the removal and replacing-ofthe lacings are much obstructed.

four to be'a convenient number.

two of th'elay'ers forming the Outer tube,

' Inmy improved tire, .the outer .tube has preferably a number of slits therein of a com venient length, running along, the center of the rim part of the outer tube. I have found The outer 5 tubesof' tires of this descriptionareordina- 'rily composed of more than one layer, either of rubber, or of gfibrous material coated with rubber, or of both rubberand fibrous material, which are all united in the process of vulcanization.

The outer t-ire,'at the separated into two parts along the edges of 'theislits, in the following manner: Between 6 there is inserted a straightpiece of linen or other fibrous" material. of about the same length as the slit, the center of which passes approximately alon the line of the slit, and which is wide enough to about the limit of the rim part of the tire, where on either side it is folded upward and overupon itself, and the-two edges of the linen or other fibrous-material come together or. nearly together at'about the line of the slit. 7

Thus, on either side of the slit, the outert'ube' of the tire is strengthened by adou-ble thick 5 'ness-of linenor otheriibrous material. The slit may be made either before or after vulcanization. This strip should beinserted before vulcanization." The linen or fibrous material is fri'ction coat'ed and becomes incorporated with, and forms. one piece with, the rest of the outer tube, in the process of vulcan'izatiom- Those portions of the linen, which are folded over upon one another, are prevent'edfi'om adhering by the insertion of alayer of tissue paper, or soapstone, soapsuds, glycerine, or mixtures thereof, or of some other substance, suitable to prevent adhesion; The holes for the lacings are made through the inner part of the outer tube, with which the outer tube has. been closed by the. lacings, r

sides of the slits, is

to extend oneither'side 7o can readily be removed. The lacings can then be undone, the inner tube can then be removed, repaired, and replaced; the outer tube can be laced together and the strip can be placed over the slit.

the presence of cement, and the danger of injury to the lacingshas been obviated. The lacings are protected by the outer portions of the outer tube, and by the strip which covers the slit in the rim portion.

strengthened, so that they are not liable to be injured by the lacings.

The piece of linen or other fibrous mate-. rial, heretofore described, may of course extend throughout the entire circumference of the outer tube, without departing from the spirit of my invention, but this is generally not desirable, because it is generally prefer than the linen or fibrous material ordinarily afiords. Where an inelastic or rigid tire is desired, this linen strip may be made continous throughout the tire, not only without detriment, but sometimes with advantage.

The linen strip, in place of being folded over upon itself, within the different layers of the outer tube, and along the line of the. edges of the rim part, may be composed of,

separatepieces placed one over the other. I deem the single piece folded .upon itself to be preferable. It makesamore perfect joint and is more durable.- One thickness of linen or other fibrous material in this part of the tire will give some of the desired advantages.

To further protect the inner tube, I prefer that on the outside of the inner tube, there should be a strip-or layer of duck or similar material, cemented to that portion of the inner, tubewhich is designed to be adjacent to the lacings above it. This strip, in place of being cemented may be in the form of aloose tongue.

In the accompanying drawing, which will serve to illustrate my inventioml have shown a perspective sectional view of the imp rovement. j

A represents the interior of inflation tube, having a strip of duck or similar material a,

cemented thereto or incorporated therewith over that portion which is adjacent to the lacings. The protective tube o-r rim portion of the tire is composed of the layers B,- 13' having slits b, b therein at suitable inter- There is no obstruction to the free passage of the lacings, through The-parts of the tire through which the lacingspass have-been lsides of which are united vals. That part of .the layers B, B which is directly over the rim of the wheel and in which the slots are made, is preferably thicker than the rest of said layers.

C is a piece of linen or other fibrous material which is laid along the layer Bat the point where the slit b is to be formed. The

edges of this piece are folded over thereupon so that they meet atsubstantially the line of the slit. The material 0 is then cemented to the outer face of the layer B and the inner face of layer B and a slit corresponding to the slit 1) in the latter, is formed therein. Holes d for the lacings D are made in the layer B at the edges of the slit. j

E is a closing strip for the slit in the outer layer B.

What I claim, and desire to secure by Let ters Patent, is-

1. A pneumatic tire, containing an outer tube, and a tube Within the same, capable of being moved within the outer tube, the outer tube being provided with one or more slits, the I sides of which are united by lacings, which lacings are protected by a closed pocket, substantially as described.

2. A pneumatic tire, containing an outer tube, and a tube within the same, capable of being moved within the outer tube, the outer tube being provided with one or more slits, able that the tire should have moreelasticitythe sides of which are united by lacings,

' which lacings are protected by a pocket, the

outlet of the pocket being closed byaremovjable strip cemented over the" same, or otherwise united to the outer tube, substantially as described.

A pneumatic tire, containing an outer tube, and a tube within the same, capable of being moved within the outer tube,- the outer tube being provided'wit-h one or mo'reslits, the H by lacings, which lacings are protected byfa closed pocket, and the inner tube being further protectedby a strip over that part of the tube, which is designed to'be adjacent to-the lacings in the outer tube, substantially as described.

4. A pneumatic tire,- having one or more slits in the outer tube of the tire whereby access can be had'to the interior of the tube, provided with lacings and lacing holes, where by the same can be closed, which lacings are protected by a pocket, substantially as described. I

pneumatic tire, having one or more slits in the outer tube of the tire, whereby access can be-had to the interior of the tube, provided with lacings and lacing holes, whereby the same can be closed, that portion of the tube, which is adjacent to the slits, being strengthened by one or more layers of linen, or other fibrous material, substantially as described.

'6. A pneumatic tire,- having one or more slits in the outer tube of the tire, whereby access can be had to the interior of the tube,

provided with laeings and lacing holes, where- In testimony whereof I have signed this by the same can be eloseQ,-that portion of specification in the presence of two su'bscrib: the tube, which is adjacent to' the slits, being ing witnesses strengthenedby a strip' of linen or other FRED." W. HARDWICK. 5 fibrousmateria], folded upon itse1f,and firmly Witnesses:

united to the tube by vulcanization, si1bstan 1 WM.- KENT, tially as described.. W. W. SCOTT.

Patgm u 50L716;

It is hereby certifie'dthat filie assiguee, Tl le N w 'York Belting jId fc'ki Q-g pahy, Limited, in ettes; Patnt No. 501,71 granted July 18,1893, m; the. a ply cationof Frederick W. Hardwibk, of Passaic, New Jersey, for qn ixpprdrezfinjt in Pneutfiatic Tiresfi ghbuld hav been described. and specified as Th}: 6w ,Yo j k Betting and Pack ipg' Company, Limited, of Great Bfitazn, instead of The New York Belbihg 93nd Pa'ck i n g Company, of England and that; the Said Ltters Patentflshbuld B6 r8541 with this co rr'ection therein that the; same may confqi'in to the record of the base in the- Ram -0m.

Signed, ountersigimil, and 5651a t hil 22il driy of'Aug u s t, D. 1893.

1 [SEAL] m0: MQREYNOLDS;

)o'untersi'gned: S. T. FISHER,

Acting Commissiorier of Patents. 

